Display Device and Color Difference Correction Method Thereof

The present disclosure relates to a display device capable of compensating for a color difference between a light-shielding area and a transparent area in a transparent display, and a method for compensating for a color difference thereof.

In general, a display device is a device that has the function of receiving, processing, and displaying images that can be viewed by a user. A display device receives a broadcast signal selected by a user from among broadcast signals transmitted from a broadcasting station, separates an image signal from the received signal, and then displays the separated image signal on a display.

In recent years, due to the development of broadcasting technology and network technology, the functions of display devices have become considerably more diverse, and the performance of the devices has also improved accordingly. In other words, display devices have evolved to provide users with not only simply broadcasted content, but also various other content.

For example, the display device can provide not only programs received from broadcasting stations, but also game play, music appreciation, Internet shopping, and customized information using various applications. In order to perform these expanded functions, the display device is basically connected to other devices or networks using various communication protocols, and can provide a ubiquitous computing environment to the user. In other words, the display device has evolved into a smart device that enables connectivity to a network and ubiquitous computing.

Meanwhile, the display device provides a transparent display through which the screen is visible by applying a transparent panel, thereby providing a visual augmented reality (AR) atmosphere to the user.

However, a display device to which a transparent panel is applied can perform a light-shielding mode and a transparent mode by using a light-shielding film that shields light from the rear surface of the transparent panel, but, when a light-shielding area and a transparent area exist simultaneously in the transparent panel, there is a problem that the image quality deteriorates due to a color difference between the light-shielding area and the transparent area caused by external lighting.

Therefore, in the future, it is necessary to develop a display device that can improve image quality by compensating for the color difference that appears between the light-shielding area and the transparent area of a transparent panel.

An object of the present disclosure is to solve the above-mentioned problems and other problems.

An object of the present disclosure is to provide a display device which can improve image quality by correcting color differences that appear between a light-shielding area and a light-transmitting area of a transparent panel based on an external illuminance value when both a light-transmitting area and a light-shielding area exist in a light-transmitting panel, and a method for correcting color differences thereof.

According to an embodiment of the present disclosure, a display device includes a transparent panel; a light-shielding part forming a light-shielding area on the transparent panel; and a processor correcting an image color of the light-shielding area, in which the processor may check whether both a light-transmitting area and a light-shielding area exist on the transparent panel, obtain an external illuminance value if both the light-transmitting area and the light-shielding area exist, and corrects an image color corresponding to the light-shielding area based on the obtained external illuminance value.

According to an embodiment of the present disclosure, a method for correcting color difference of a display device including a light-shielding film for shielding light from a transparent panel may include checking whether both a light-transmitting area and a light-shielding area exist in the transparent panel; obtaining an external illuminance value if both a light-transmitting area and a light-shielding area exist in the transparent panel; and correcting the image color corresponding to the light-shielding area based on the obtained external illuminance value.

According to one embodiment of the present disclosure, a display device and a method for correcting color differences thereof can improve image quality and provide a stable image to a user by correcting a color difference appearing between a light-shielding area and a light-transmitting area of a transparent panel based on an external illuminance value when both a light-transmitting area and a light-shielding area exist in a light-transmitting panel.

Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the attached drawings, and regardless of the drawing symbols, identical or similar components will be given the same reference numerals and redundant descriptions thereof will be omitted. The suffixes “module” and “part” for components used in the description below are assigned or mixed in consideration of easiness in writing the specification and do not have distinctive meanings or roles by themselves. In addition, when describing embodiments disclosed in this specification and if it is determined that a specific description of a related known technology may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and technical scope of the present disclosure.

Terms including ordinal numbers, such as first, second, or the like, may be used to describe various components, but the components are not limited by the terms. The terms are used only to distinguish one component from another..

When it is said that a component is “connected” or “accessed” to another component, it should be understood that it may be directly connected or accessed to that other component, but that there may be other components in between. On the other hand, when it is said that a component is “directly connected” or “directly accessed” to another component, it should be understood that there are no other components in between.

1 FIG. is a block diagram illustrating a display device having a transparent panel according to one embodiment of the present disclosure.

1 FIG. 400 410 422 410 430 As illustrated in, the display deviceof the present disclosure may include a transparent panel, a light-shielding partforming a light-shielding area on the light-transmitting panel, and a processorcorrecting an image color of the light-shielding area.

400 440 450 In addition, the display deviceof the present disclosure may further include an illuminance sensorthat senses external illuminance and a memorythat stores an illuminance-specific image color information table.

420 410 For example, the light-shielding partmay include a light-shielding film that shields light from the rear surface of the light-transmitting panel, a driving part that moves the light-shielding film to a target position, and a light-shielding box that covers the light-shielding film and the driving part.

410 410 Here, the light-shielding film can move along the rear surface of the light-transmitting panelto form a light-shielding area on the light-transmitting panel.

420 The light-shielding partmay include a mechanical light-shielding part and an electronic light-shielding part.

410 For example, the mechanical light-shielding part may include a light-shielding film that shields light from the rear surface of the light-transmitting panel, a driving part that moves the light-shielding film to a target position, and a sensor that senses the movement distance of the light-shielding film.

The light-shielding film may be made of a roll-up material, but this is only an example and is not limited thereto.

410 410 In addition, the light-shielding film has a plurality of magnets arranged at regular intervals on the front surface facing the rear surface of the light-transmitting panel, and the sensors include at least one first sensor that senses a first polarity of the magnets and at least one second sensor that senses a second polarity of the magnets, and the first sensor and the second sensor can be arranged on the rear surface of the light-transmitting panel.

Here, a plurality of magnets are arranged in a matrix form on the light-shielding film, and the plurality of magnets arranged in the column direction or the transverse direction can be arranged by mixing magnets having a first polarity and magnets having a second polarity.

Additionally, the first sensor may be arranged to correspond to a first row among the plurality of magnets when the direction of movement of the light-shielding film is perpendicular to the transparent panel, and the second sensor may be arranged to correspond to a second row adjacent to the first row.

For example, the plurality of magnets arranged in the first row may be arranged such that magnets having the first polarity and magnets having the second polarity are mixed in a first arrangement order, and the plurality of magnets arranged in the second row may be arranged such that magnets having the first polarity and magnets having the second polarity are mixed in a second arrangement order that is different from the first arrangement order of the first row.

Additionally, the first sensor may be arranged to correspond to a first row among the plurality of magnets when the direction of movement of the light-shielding film is horizontal to the transparent panel, and the second sensor may be arranged to correspond to a second row adjacent to the first row.

In addition, the driving part may include a step motor or a DC motor, but this is only an example and is not limited thereto.

As another example, the electronic light-shielding part may include a light-shielding plate having a plurality of light-shielding pixels arranged in a matrix form, and a driving part that drives the light-shielding pixels of the light-shielding plate to move a light-shielding area of the light-shielding plate to a movement target position.

Here, the light-shielding plate may include a transparent upper plate on which the first electrode is arranged, a transparent lower plate on which the second electrode is arranged and has a predetermined distance from the transparent upper plate, and a light-shielding material filled in a light-shielding pixel area between the transparent upper plate and the transparent lower plate.

At this time, the light-shielding plate can transmit or block light by changing the arrangement of light-shielding materials in each light-shielding pixel area according to the voltage applied to the first electrode and the second electrode.

In addition, the light-shielding material may be composed of at least one of a mixed liquid crystal in which a plurality of liquid crystals having different arrangement characteristics are mixed, and a mixed pigment in which two or three pigments having different light absorption wavelength bands are mixed to block the wavelength band of visible light.

For example, the mixed liquid crystal may be a mixture of polymer dispersed nematic liquid crystals (PDNLC), negative nematic liquid crystals, and cholesteric liquid crystals in a certain ratio.

Additionally, the mixed pigment may be a pigment including an Azodye, a Quinacridone, and a perylene substance, but this is only an example and is not limited thereto.

430 410 Next, the processorchecks whether both a light-transmitting area and a light-shielding area exist in the light-transmitting panel, and if both a light-transmitting area and a light-shielding area exist, obtains an external illuminance value, and can correct the image color corresponding to the light-shielding area based on the obtained external illuminance value.

410 430 410 410 410 In one embodiment, when checking whether both a light-transmitting area and a light-shielding area exist in the light-transmitting panel, the processormay check the current screen mode of the light-transmitting panel, and check whether both a light-transmitting area and a light-shielding area exist in the light-transmitting panelbased on the current screen mode of the light-transmitting panel.

430 410 410 410 410 Here, the processorcan check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelif the current screen mode of the light-transmitting panelis a transparent screen mode or a partially light-shielding screen mode, and can check that only a light-shielding area exists in the light-transmitting panelif the current screen mode of the light-transmitting panelis a full light-shielding screen mode.

430 420 410 410 420 410 410 In addition, the processorcan control the driving part so that the light-shielding film of the light-shielding partmoves to a target position that shields light from a partial area of the light-transmitting panelwhen the light-transmitting panelis in a partial light-shielding screen mode, and can control the driving part so that the light-shielding film of the light-shielding partmoves to a target position that shields light from the entire area of the light-transmitting panelwhen the light-transmitting panelis in a full light-shielding screen mode.

410 430 420 In addition, if the current screen mode of the light-transmitting panelis a transparent screen mode, the processorcan recognize an area overlapping with the light-shielding box of the light-shielding partamong the entire area of the transparent panel as a light-shielding area, and recognize the remaining area as a light-transmitting area.

450 Here, the memorycan store pixel position information located within the overlapping area of the transparent panel overlapping the light-shielding box.

430 450 410 At this time, the processorcan recognize the light-shielding area based on pixel position information within the overlapping area stored in the memoryif the light-transmitting panelis in transparent screen mode.

430 410 410 410 410 410 410 In addition, the processorcan check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelif the current screen mode of the light-transmitting panelis a partial light-shielding screen mode, check that only a light-transmitting area exists in the light-transmitting panelif the current screen mode of the light-transmitting panelis a transparent screen mode, and check that only a light-shielding area exists in the light-transmitting panelif the current screen mode of the light-transmitting panelis a full light-shielding screen mode.

430 420 410 410 420 410 410 Here, the processorcan control the driving part so that the light-shielding film of the light-shielding partmoves to a target position that shields light from a partial area of the light-transmitting panelwhen the light-transmitting panelis in a partial light-shielding screen mode, and can control the driving part so that the light-shielding film of the light-shielding partmoves to a target position that shields light from the entire area of the light-transmitting panelwhen the light-transmitting panelis in a full light-shielding screen mode.

430 410 420 410 410 410 420 410 410 In addition, the processorcan check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelwhile the light-shielding film of the light-shielding partmoves to a target position for shielding light from a partial area of the light-transmitting panelwhen the screen mode of the light-transmitting panelis a transition mode from a transparent screen mode to a partial light-shielding screen mode, and can check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelwhile the light-shielding film of the light-shielding partmoves to a target position for shielding light from the entire area of the light-transmitting panelwhen the screen mode of the light-transmitting panelis a transition mode from a transparent screen mode to a full light-shielding screen mode.

430 410 420 410 410 410 420 410 410 Here, the processorcan check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelwhile the light-shielding film of the light-shielding partmoves to a target position for transmitting light to the entire area of the light-transmitting panelif the screen mode of the light-transmitting panelis a transition mode from a full light-shielding screen mode to a transparent screen mode, and can check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelwhile the light-shielding film of the light-shielding partmoves to a target position for light-shielding a partial area of the light-transmitting panelif the screen mode of the light-transmitting panelis a transition mode from a full light-shielding screen mode to a partial light-shielding screen mode.

410 430 420 410 In another embodiment, when checking whether both a light-transmitting area and a light-shielding area exist in the light-transmitting panel, the processorcan check the position of the light-shielding film of the light-shielding part, and check whether both a light-transmitting area and a light-shielding area exist in the light-transmitting panelbased on the light-shielding film position.

430 420 420 Here, when the processorchecks the position of the light-shielding film of the light-shielding part, if the light-shielding film of the light-shielding partmoves to the target position, the movement distance of the light-shielding film can be calculated, and the position of the light-shielding film can be checked based on the movement distance of the light-shielding film.

430 410 410 For example, the processorcan check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelif the movement distance of the light-shielding film is 0 or less than the maximum value, and can check that only a light-shielding area exists in the light-transmitting panelif the movement distance of the light-shielding film is equal to or greater than the maximum value.

430 420 410 In addition, the processorcan recognize an area overlapping with the light-shielding box of the light-shielding partamong the entire area of the light-transmitting panelas a light-shielding area when the movement distance of the light-shielding film is 0, and recognize the remaining area as a light-transmitting area.

450 410 Here, the memorycan store pixel position information located within the overlapping area of the light-transmitting paneloverlapping the light-shielding box.

430 450 At this time, the processorcan recognize the light-shielding area based on pixel position information within the overlapping area stored in the memoryif the movement distance of the light-shielding area is 0.

430 410 410 410 In addition, the processorcan check that only a light-transmitting area exists in the light-transmitting panelif the movement distance of the light-shading film is 0, check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelif the movement distance of the light-shading film is less than a maximum value, and check that only a light-shielding area exists in the light-transmitting panelif the movement distance of the light-shielding film is equal to or greater than a maximum value.

430 410 410 410 410 In addition, the processorcan check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelwhile the light-shielding film moves to a target position that shields light from a partial area of the light-transmitting panelif the movement distance of the light-shielding film is variable from 0 to less than a maximum value, and check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelwhile the light-shielding film moves to a target position that shields light from the entire area of the light-transmitting panelif the movement distance of the light-shielding film is variable from 0 to equal to or greater than a maximum value.

430 410 410 410 410 In addition, the processorcan check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelwhile the light-shielding film moves to a target position that transmits light to the entire area of the light-transmitting panelif the movement distance of the light-shielding film is variable from a maximum value to 0, and check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelwhile the light-shielding film moves to a target position that shields light from a partial area of the light-transmitting panelif the movement distance of the light-shielding film is variable from a maximum value to less than a maximum value.

420 430 410 420 In another embodiment, when checking the position of the light-shielding film of the light-shielding part, the processorcalculates the movement time and movement position of the light-shielding film based on the sensing signal obtained from the position sensor disposed on the light-transmitting panelwhen the light-shielding film of the light-shielding partmoves to the target position, and the light-shielding film position can also be checked based on the calculated movement time and movement position of the light-shielding film.

430 410 440 Next, when the processorobtains an external illuminance value, if determining that both a light-transmitting area and a light-shielding area exist in the light-transmitting panel, can obtain the current external illuminance value from the illuminance sensor.

430 450 Next, when correcting the image color corresponding to a light-shielding area, the processorcan extract image color information corresponding to an external illuminance value obtained from an illuminance-specific image color information table stored in the memory, and correct the R, G, and B colors of the image corresponding to the light-shielding area based on the extracted image color information.

For example, the illuminance-specific image color information table may include an illuminance-specific color gamut lookup table.

430 420 In addition, the processorcan calculate the time and position at which the light-shielding film of the light-shielding partmoves when correcting the image color corresponding to the light-shielding area, determine the image correction area corresponding to the light-shielding area based on the calculated time and position, and correct the R, G, and B colors of the image corresponding to the image correction area based on the extracted image color information.

430 410 Here, the processorcan correct the R, G, and B values of pixels corresponding to the horizontal coordinates of the vertical line in the image correction area of the light-transmitting panelaccording to the movement position of the light-shielding film.

430 410 At this time, the processorcan calculate the movement time and movement position of the light-shielding film based on the sensing signal obtained from the position sensor placed on the light-transmitting panel.

In this way, the present disclosure can provide a stable image to a user by improving image quality by correcting the color difference that appears between the light-shielding area and the light-transmitting area of a transparent panel based on an external illuminance value when both a light-transmitting area and a light-shielding area exist in a light-transmitting panel.

2 2 a c FIG.() to() are views for explaining the image color difference of a transparent panel including a constant light-shielding area.

2 2 a b FIG.() and() 420 410 As illustrated in, the light-shielding partmay include a light-shielding film that shields light from the rear surface of the light-transmitting panel, a driving part that moves the light-shielding film to a target position, and a light-shielding box that covers the light-shielding film and the driving part.

420 410 410 Here, the light-shielding box of the light-shielding partis fixedly positioned to overlap a part of the light-transmitting paneland can form a constant light-shielding area on the light-transmitting panel.

420 410 410 For example, the light-shielding box of the light-shielding partcan be fixedly positioned to overlap the lower end part of the light-transmitting paneland form a constant light-shielding area at the lower end part of the light-transmitting panel.

420 410 410 500 In this way, when the light-shielding partis placed overlapping the light-transmitting panel, the light-transmitting panelhas a light-transmitting area and a constant light-shielding area even in a transparent screen mode without a light-shielding film due to external lighting.

2 c FIG.() 412 410 Here, as illustrated in, the imagedisplayed on the light-transmitting panelmay have a color difference between the image of the light-transmitting area and the image of the constant light-shielding area, resulting in a deterioration in image quality.

3 3 a c FIG.() to() are drawings for explaining the image color difference of a transparent panel including a constant light-shielding area and a variable light-shielding area.

3 3 a c FIG.() to() 420 410 422 410 420 500 422 422 As illustrated in, when the light-shielding partis arranged to overlap a partial area of the light-transmitting panel, in a partial light-shielding screen mode in which a light-shielding filmexists in a partial area of the light-transmitting panel, a constant light-shielding area due to the light-shielding box overlap of the light-shielding partby external lighting, a variable light-shielding area due to the movement of the light-shielding film, and a light-transmitting area in which the light-shielding filmdoes not overlap exist.

3 c FIG.() 412 410 Here, as illustrated in, the imagedisplayed on the light-transmitting panelmay have a color difference between the image of the light-transmitting area and the image of the light-shielding area including the constant light-shielding area and the variable light-shielding area, which may result in a deterioration in image quality.

4 4 a c FIG.() to() are views for explaining an image of a transparent panel including the entire light-shielding area.

4 4 a c FIG.() to() 420 410 422 410 422 As illustrated in, when the light-shielding partis arranged to overlap the entire area of the light-transmitting panel, in the entire light-shielding screen mode in which the light-shielding filmexists over the entire area of the light-transmitting panel, the entire light-shielding area exists due to movement of the light-shielding film.

4 c FIG.() 412 410 410 Here, as illustrated in, the imagedisplayed on the light-transmitting paneldoes not have an image color difference because only a light-shielding area exists on the light-transmitting panel.

5 5 a c FIG.() to() are views for explaining a transparent panel in which the image color difference between the light-shielding area and the light-transmitting area is corrected.

5 5 a c FIG.() to() 420 410 430 440 410 As illustrated in, when a light-shielding partis arranged to overlap a partial area of a transparent panel, the processorof the present disclosure can sense an external illuminance value through an illuminance sensorif the light-transmitting panelis in transparent screen mode, and correct the image color corresponding to a constant light-shielding area based on the external illuminance value.

430 410 410 410 440 In addition, the processorof the present disclosure can control a driving part to move a light-shielding film to a target position that shields light from a partial area of the light-transmitting panelwhen the light-transmitting panelis in a partial light-shielding screen mode, thereby forming a variable light-shielding area on the light-transmitting panel, sense an external illuminance value through an illuminance sensor, and correct the image color corresponding to the constant light-shielding area and the variable light-shielding area based on the external illuminance value.

5 c FIG.() 412 410 Accordingly, as illustrated in, the imagedisplayed on the light-transmitting panelcan provide a stable image to the user by improving the image quality by correcting the color difference that occurs between the image of the light-transmitting area and the image of the light-shielding area including the constant light-shielding area and the variable light-shielding area.

6 6 a b FIG.() and() are views for explaining the operation of the light-shielding film.

6 6 a b FIG.() and() 422 424 422 430 424 426 422 424 As illustrated in, the light-shielding part of the present disclosure may include a light-shielding filmthat shields light from the rear surface of a transparent panel, a driving partthat moves the light-shielding filmto a target position, a processorthat controls the driving part, and a light-shielding boxthat covers the light-shielding filmand the driving part.

422 Here, the light-shielding filmcan move along the rear surface of the transparent panel to form a light-shielding area on the transparent panel.

422 The mechanical light-shielding filmmay be made of a roll-up material, but this is only an example and is not limited thereto.

422 In addition, the light-shielding filmhas a plurality of magnets arranged at regular intervals on the front surface facing the rear surface of the transparent panel, and the sensors include at least one first sensor that senses a first polarity of the magnets and at least one second sensor that senses a second polarity of the magnets, and the first sensor and the second sensor can be arranged on the rear surface of the transparent panel.

Here, a plurality of magnets are arranged in a matrix form on the light-shielding film, and the plurality of magnets arranged in the column direction or the transverse direction can be arranged by mixing magnets having a first polarity and magnets having a second polarity.

Additionally, the first sensor may be arranged to correspond to a first column among the plurality of magnets when the direction of movement of the light-shielding film is perpendicular to the transparent panel, and the second sensor may be arranged to correspond to a second column adjacent to the first column.

424 In addition, the driving partmay include a step motor or a DC motor, but this is only one embodiment and is not limited thereto.

422 As another example, the electronic light-shielding filmmay include a light-shielding plate in which a plurality of light-shielding pixels are arranged in a matrix form.

Here, the light-shielding plate may include a transparent upper plate on which the first electrode is arranged, a transparent lower plate on which the second electrode is arranged and has a predetermined distance from the transparent upper plate, and a light-shielding material filled in a light-shielding pixel area between the transparent upper plate and the transparent lower plate.

At this time, the light-shielding plate can transmit or block light by changing the arrangement of light-shielding materials in each light-shielding pixel area according to the voltage applied to the first electrode and the second electrode.

In addition, the light-shielding material may be composed of at least one of a mixed liquid crystal in which a plurality of liquid crystals having different arrangement characteristics are mixed, and a mixed pigment in which two or three pigments having different light absorption wavelength bands are mixed to block the wavelength band of visible light.

430 424 422 424 422 Next, the processorcan control the driving partto move the light-shielding filmto a target position for shielding light from a partial area of the transparent panel when the transparent panel is in a partial light-shielding screen mode, and control the driving partto move the light-shielding filmto a target position for shielding light from the entire part of the transparent panel when the transparent panel is in a full light-shielding screen mode.

7 7 a c FIG.() to() are views for explaining the movement of a light-shielding film of a light-shielding part that is arranged to overlap a transparent panel.

7 a FIG.() 420 410 410 As illustrated in, the present disclosure can recognize an area overlapping with a light-shielding box of a light-shielding partamong the entire area of the light-transmitting panelas a light-shielding area when the current screen mode of the light-transmitting panelis a transparent screen mode, and recognize the remaining area as a light-transmitting area.

410 422 Here, the present disclosure can store pixel position information located within an overlapping area of a transparent paneloverlapping with a light-shielding box of a light-shielding partin a memory.

410 At this time, the present disclosure can recognize the light-shielding area based on pixel position information within the overlapping area stored in the memory when the light-transmitting panelis in transparent screen mode.

7 b FIG.() 422 422 410 410 As illustrated in, the present disclosure can control the light-shielding filmof the light-shielding partto move to a target position that shields light from a partial area of the light-transmitting panelwhen the light-transmitting panelis in a partial light-shielding screen mode.

7 c FIG.() 422 422 410 410 In addition, as illustrated in, the present disclosure can control the light-shielding filmof the light-shielding partto move to a target position that shields the entire area of the light-transmitting panelwhen the light-transmitting panelis in full light-shielding screen mode.

410 410 410 410 In this way, the present disclosure can check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelif the current screen mode of the light-transmitting panelis a transparent screen mode or a partially light-shielding screen mode and check that only a light-shielding area exists in the light-transmitting panelif the current screen mode of the light-transmitting panelis a full light-shielding screen mode.

8 8 a c FIG.() to() are views for explaining the movement of a light-shielding film of a light-shielding part that is arranged so as not to overlap a transparent panel.

8 a FIG.() 410 422 410 410 As illustrated in, the present disclosure can recognize the entire area of the light-transmitting panelas a light-transmitting area when the light-shielding box of the light-shielding partis positioned so as not to overlap the light-transmitting paneland the current screen mode of the light-transmitting panelis a transparent screen mode.

410 410 In other words, the present disclosure can check that only a light-transmitting area exists on the light-transmitting panelwhen the current screen mode of the light-transmitting panelis a transparent screen mode.

8 b FIG.() 422 422 410 410 In addition, as illustrated in, the present disclosure can control the light-shielding filmof the light-shielding partto move to a target position that shields light from a partial area of the light-transmitting panelwhen the current screen mode of the light-transmitting panelis a partial light-shielding screen mode.

410 410 Here, the present disclosure can check that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelwhen the current screen mode of the light-transmitting panelis a partial light-shielding screen mode.

8 c FIG.() 422 422 410 410 In addition, as illustrated in, the present disclosure can control the light-shielding filmof the light-shielding partto move to a target position that shields the entire area of the light-transmitting panelwhen the light-transmitting panelis in full light-shielding screen mode.

410 410 Here, the present disclosure can check that only a light-shielding area exists in the light-transmitting panelwhen the current screen mode of the light-transmitting panelis a full light-shielding screen mode.

9 FIG. is a view for explaining a process of correcting the color difference of an image of a transparent panel overlapping a light-shielding part.

9 FIG. 420 410 420 410 410 As illustrated in, in the present disclosure, when a light-shielding partoverlaps with a transparent panel, a light-shielding box of the light-shielding partis fixedly arranged to overlap with a part of the light-transmitting panel, and can form a constant light-shielding area on the light-transmitting panel.

422 420 410 410 In addition, the light-shielding filmof the light-shielding partcan move along the rear surface of the light-transmitting panelto form a variable light-shielding area on the light-transmitting panel.

430 410 410 420 410 The processorof the present disclosure can check the current screen mode of the light-transmitting panel, and if the current screen mode of the light-transmitting panelis a transparent screen mode, recognize an area overlapping with the light-shielding box of the light-shielding partamong the entire area of the light-transmitting panelas a light-shielding area, and recognize the remaining area as a light-transmitting area.

430 440 410 Here, the processorof the present disclosure can sense an external illuminance value through an illuminance sensorwhen the light-transmitting panelis in transparent screen mode, and correct the image color corresponding to a constant light-shielding area based on the external illuminance value.

430 450 In other words, the processorof the present disclosure can extract image color information corresponding to an external illuminance value obtained from an illuminance-specific image color information table stored in a memory, and correct the R, G, and B colors of an image corresponding to a constant light-shielding area based on the extracted image color information.

For example, the illuminance-specific image color information table may include an illuminance-specific color gamut lookup table.

430 410 410 422 420 410 In addition, the processorof the present disclosure can check the current screen mode of the light-transmitting panel, and if the current screen mode of the light-transmitting panelis a partial light-shielding screen mode, control the driving part so that the light-shielding filmof the light-shielding partmoves to a target position that shields light from a partial area of the light-transmitting panel.

430 410 420 422 420 410 Here, the processorof the present disclosure can recognize that, if the current screen mode of the light-transmitting panelis a partial light-shielding screen mode, there exists both a light-shielding area including a constant light-shielding area by the light-shielding box of the light-shielding partand a variable light-shielding area by the light-shielding filmof the light-shielding parton the light-transmitting panel, and a light-transmitting area, which is the remaining area.

430 440 410 At this time, the processorof the present disclosure can sense an external illuminance value through an illuminance sensorwhen the light-transmitting panelis in a partial light-shielding screen mode, and correct the image color corresponding to the constant light-shielding area and the variable light-shielding area based on the external illuminance value.

430 450 In other words, the processorof the present disclosure can extract image color information corresponding to an external illuminance value obtained from an illuminance-specific image color information table stored in a memory, and correct R, G, and B colors of an image corresponding to a constant light-shielding area and a variable light-shielding area based on the extracted image color information.

430 410 410 422 420 410 In addition, the processorof the present disclosure can check the current screen mode of the light-transmitting panel, and if the current screen mode of the light-transmitting panelis a full light-shielding screen mode, control the driving part so that the light-shielding filmof the light-shielding partmoves to a target position that shields light from the entire area of the light-transmitting panel.

430 410 422 422 422 410 Here, the processorof the present disclosure can recognize that, if the current screen mode of the light-transmitting panelis a full light-shielding screen mode, only a light-shielding area including a constant light-shielding area by the light-shielding box of the light-shielding partand a variable light-shielding area by the light-shielding filmof the light-shielding partexists on the light-transmitting panel.

430 410 At this time, the processorof the present disclosure can maintain the image color corresponding to the entire area of the transparent panel without correction if the light-transmitting panelis in full light-shielding screen mode.

10 FIG. is a view for explaining a process of correcting the color difference of an image of a transparent panel that does not overlap a light-shielding part.

10 FIG. 430 422 410 410 410 410 410 410 410 As illustrated in, the processorof the present disclosure, when the light-shielding partis not overlapped with the light-transmitting panel, can recognize that only a light-transmitting area exists in the light-transmitting panelif the current screen mode of the light-transmitting panelis a transparent screen mode, recognize that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelif the current screen mode of the light-transmitting panelis a partial light-shielding screen mode, and recognize that only a light-shielding area exists in the light-transmitting panelif the current screen mode of the light-transmitting panelis a full light-shielding screen mode.

430 422 420 410 410 422 420 410 410 Here, the processorof the present disclosure can control the driving part so that the light-shielding filmof the light-shielding partmoves to a target position for shielding light from a partial area of the light-transmitting panelwhen the light-transmitting panelis in a partial light-shielding screen mode, and can control the driving part so that the light-shielding filmof the light-shielding partmoves to a target position for shielding light for the entire area of the light-transmitting panelwhen the light-transmitting panelis in a full light-shielding screen mode.

430 440 410 410 Accordingly, the processorof the present disclosure can sense an external illuminance value through the illuminance sensorand correct the image color corresponding to the light-shielding area based on the external illuminance value by recognizing that both a light-transmitting area and a light-shielding area exist in the light-transmitting panelwhen the light-transmitting panelis in a partial light-shielding screen mode.

430 450 In other words, the processorof the present disclosure can extract image color information corresponding to an external illuminance value obtained from an illuminance-specific image color information table stored in a memory, and correct the R, G, and B colors of an image corresponding to a constant light-shielding area based on the extracted image color information.

For example, the illuminance-specific image color information table may include an illuminance-specific color gamut lookup table.

430 410 410 In addition, the processorof the present disclosure can maintain the image color corresponding to the entire area of the transparent panel without correction because, when the light-transmitting panelis in transparent screen mode or full light-shielding screen mode, neither a light-transmitting area nor a light-shielding area exists in the light-transmitting panel, and therefore, no color difference occurs between the light-transmitting area and the light-shielding area.

11 FIG. is a flowchart for explaining a method for correcting color difference of a display device according to an embodiment of the present disclosure.

11 FIG. 10 As illustrated in, the present disclosure can check whether the display device is powered on (S).

20 Next, the present disclosure can check whether both a light-transmitting area and a light-shielding area exist on the transparent panel when power is applied (S).

In one embodiment, the present disclosure can check a current screen mode of a transparent panel, and check whether both a light-transmitting area and a light-shielding area exist in the transparent panel based on the current screen mode of the transparent panel.

Here, the present disclosure can check that both a light-transmitting area and a light-shielding area exist in the transparent panel if the current screen mode of the transparent panel is a transparent screen mode or a partially light-shielding screen mode, and can check that only a light-shielding area exists in the transparent panel if the current screen mode of the transparent panel is a full light-shielding screen mode.

In some cases, the present disclosure can check that both a light-transmitting area and a light-shielding area exist in the transparent panel if the current screen mode of the transparent panel is a partial light-shielding screen mode, check that only a light-transmitting area exists in the transparent panel if the current screen mode of the transparent panel is a transparent screen mode, and check that only a light-shielding area exists in the transparent panel if the current screen mode of the transparent panel is a full light-shielding screen mode.

In another case, the present disclosure can check that both a light-transmitting area and a light-shielding area exist in the transparent panel while the light-shielding film moves to a target position for shielding light from a partial area of the transparent panel when the screen mode of the transparent panel is a transition mode from a transparent screen mode to a partial light-shielding screen mode, and check that both a light-transmitting area and a light-shielding area exist in the transparent panel while the light-shielding film moves to a target position for shielding light from an entire area of the transparent panel when the screen mode of the transparent panel is a transition mode from a transparent screen mode to a full light-shielding screen mode.

Here, the present disclosure can check that both a light-transmitting area and a light-shielding area exist in the transparent panel while the light-shielding film moves to a target position for transmitting light to the entire area of the transparent panel when the screen mode of the transparent panel is a transition mode from a full light-shielding screen mode to a transparent screen mode, and check that both a light-transmitting area and a light-shielding area exist in the transparent panel while the light-shielding film moves to a target position for shielding light from a partial area of the transparent panel when the screen mode of the transparent panel is a transition mode from a full light-shielding screen mode to a partial light-shielding screen mode.

In another embodiment, the present disclosure can check a light-shielding film position and check whether both a light-transmitting area and a light-shielding area exist in a transparent panel based on the light-shielding film position.

Here, the present disclosure, when checking the position of the light-shielding film, if the light-shielding film of the light-shielding part moves to the target position, can calculates the movement distance of the light-shielding film and check the position of the light-shielding film based on the movement distance of the light-shielding film.

For example, the present disclosure, if the movement distance of the light-shielding film is 0 or less than a maximum value, can check that both a light-transmitting area and a light-shielding area exist in a transparent panel, and can check that only a light-shielding area exists in a transparent panel if the movement distance of the light-transmitting area is equal to or greater than a maximum value.

In addition, the present disclosure, if the movement distance of the light-shielding film is 0, can recognize an area overlapping with a light-shielding box of a light-shielding part among the entire area of a transparent panel as a light-shielding area and recognize the remaining area as a light-transmitting area.

Here, the present disclosure can recognize a light-shielding area based on the pixel position information within the overlapping area stored in the memory when the movement distance of the light-shielding film is 0, in a case where pixel position information located within the overlapping area of a transparent panel overlapping with a light-shielding box is stored in the memory.

In addition, the present disclosure can check that only a light-transmitting area exists in the transparent panel when the movement distance of the light-shielding film is 0, check that both a light-transmitting area and a light-shielding area exist in the transparent panel when the movement distance of the light-shielding film is less than a maximum value, and check that only a light-shielding area exists in the transparent panel when the movement distance of the light-shielding film is equal to or greater than the maximum value.

In addition, the present disclosure can check that both a light-transmitting area and a light-shielding area exist on the transparent panel while the light-shielding film moves to a target position that shields light from a partial area of the transparent panel when the movement distance of the light-shielding film is variable from 0 to less than a maximum value, and check that both a light-transmitting area and a light-shielding area exist on the transparent panel while the light-shielding film moves to a target position that shields light from the entire area of the transparent panel when the movement distance of the light-shielding film is variable from 0 to equal to or greater than a maximum value.

In addition, the present disclosure can check that both a light-transmitting area and a light-shielding area exist on the transparent panel while the light-shielding film moves to a target position that transmits light to the entire area of the transparent panel when the movement distance of the light-shielding film is variable from a maximum value to 0, and check that both a light-transmitting area and a light-shielding area exist on the transparent panel while the light-shielding film moves to a target position that shields light from a partial area of the transparent panel when the movement distance of the light-shielding film is variable from a maximum value to less than a maximum value.

In another embodiment, the present disclosure calculates the movement time and movement position of the light-shielding film based on a sensing signal obtained from a position sensor disposed on a transparent panel if the light-shielding film moves to a target position when checking the position of the light-shielding film, and the light-shielding film position can also be checked based on the calculated movement time and movement position of the light-shielding film.

30 Next, the present disclosure can obtain an external illuminance value when both a light-transmitting area and a light-shielding area exist in the transparent panel (S).

Here, the present disclosure can obtain the current external illuminance value from the illuminance sensor when it is determined that both a light-transmitting area and a light-shielding area exist in the transparent panel.

40 Next, the present disclosure can correct the image color corresponding to a light-shielding area based on the obtained external illuminance value (S).

Here, the present disclosure can extract image color information corresponding to an external illuminance value obtained from an illuminance-specific image color information table stored in a memory, and correct R, G, and B colors of an image corresponding to a light-shielding area based on the extracted image color information.

For example, the illuminance-specific image color information table may include an illuminance-specific color gamut lookup table.

In addition, the present disclosure can calculate the time and position at which a light-shielding film moves, determine an image correction area corresponding to the light-shielding area based on the calculated time and position, and correct R, G, and B colors of an image corresponding to the image correction area based on extracted image color information.

Here, the present disclosure can correct the R, G, and B values of pixels corresponding to horizontal coordinates of vertical lines in an image correction area of a transparent panel according to the movement position of the light-shielding film.

At this time, the present disclosure can calculate the movement time and movement position of the light-shielding film based on a sensing signal obtained from a position sensor disposed on a transparent panel.

50 In addition, the present disclosure can check whether the display device is powered off (S), and if the power is powered off, the color difference correction process can be terminated.

In this way, the present disclosure can provide a stable image to a user by improving image quality by correcting the color difference that appears between the light-shielding area and the light-transmitting area of a transparent panel based on an external illuminance value when both a light-transmitting area and a light-shielding area exist in a light-transmitting panel.

12 FIG. is a block diagram illustrating a configuration of a display device according to an embodiment of the present disclosure.

12 FIG. 100 130 135 140 150 170 173 180 185 190 Referring to, a display devicemay include a broadcast reception module, an external device interface part, a storage part, a user input part, a control part, a wireless communication interface part, a display part, an audio output part, and a power supply part.

130 131 132 133 The broadcast reception modulemay include a tuner, a demodulator, and a network interface.

131 131 The tunermay select a specific broadcast channel according to a channel selection command. The tunermay receive broadcast signals for the selected specific broadcast channel.

132 The demodulation partmay divide the received broadcast signals into video signals, audio signals, and broadcast program-related data signals, and may restore the divided video signals, audio signals, and data signals into an output available form.

133 100 133 The network interfacemay provide an interface for connecting the display deviceto a wired/wireless network comprising internet network. The network interfacemay transmit or receive data to or from another user or another electronic device through an accessed network or another network linked to the accessed network.

133 133 The network interface partmay access a predetermined webpage through an accessed network or another network linked to the accessed network. In other words, the network interface partmay transmit or receive data to or from a corresponding server by accessing a predetermined webpage through the network.

133 133 The network interface partmay receive content or data provided from a content provider or a network operator. In other words, the network interface partmay receive content, such as movies, advertisements, games, VODs, and broadcast signals, which are provided from the content provider or the network operator, and information relating thereto through the network.

133 In addition, the network interface partmay receive firmware update information and update files provided from the network operator, and may transmit data to the Internet or content provider or the network operator.

133 The network interfacemay select and receive a desired application among applications open to the air, through network.

135 170 140 The external device interface partmay receive an application or an application list in an adjacent external device and deliver the application or the application list to the control partor the storage part.

135 100 135 100 135 The external device interface partmay provide a connection path between the display deviceand an external device. The external device interface partmay receive at least one of an image or audio outputted from an external device that is wirelessly or wiredly connected to the display deviceand deliver the received image or the audio to the controller. The external device interface partmay include a plurality of external input terminals. The plurality of external input terminals may include an RGB terminal, at least one High Definition Multimedia Interface (HDMI) terminal, and a component terminal.

135 180 135 185 An image signal of an external device inputted through the external device interface partmay be outputted through the display part. A sound signal of an external device inputted through the external device interface partmay be outputted through the audio output part.

135 An external device connectable to the external device interface partmay be one of a set-top box, a Blu-ray player, a DVD player, a game console, a sound bar, a smartphone, a PC, a USB Memory, and a home theater system but this is just exemplary.

100 100 Additionally, some content data stored in the display devicemay be transmitted to a user or an electronic device, which is selected from other users or other electronic devices pre-registered in the display device.

140 170 The storage partmay store signal-processed image, voice, or data signals stored by a program in order for each signal processing and control in the control part.

140 135 133 In addition, the storage partmay perform a function for temporarily storing image, voice, or data signals output from the external device interface partor the network interface part, and may store information on a predetermined image through a channel memory function.

140 135 133 The storage partmay store an application or an application list input from the external device interface partor the network interface part.

100 140 The display devicemay play content files (e.g., video files, still image files, music files, document files, application files, etc.) stored in the storage part, and may provide the content files to a user.

150 170 170 150 200 170 200 The user input partmay transmit signals input by a user to the control part, or may transmit signals from the control partto a user. For example, the user input partmay receive or process control signals such as power on/off, channel selection, and screen setting from the remote control deviceor transmit control signals from the control partto the remote control deviceaccording to various communication methods such as Bluetooth, Ultra Wideband (WB), ZigBee, Radio Frequency (RF), and IR communication methods.

150 170 In addition, the user input partmay transmit, to the control part, control signals input from local keys (not illustrated) such as a power key, a channel key, a volume key, and a setting key.

170 180 170 135 Image signals that are image-processed by the control partmay be input to the display partand displayed as images corresponding to the image signals. In addition, image signals that are image-processed by the control partmay be input to an external output device through the external device interface part.

170 185 170 135 Voice signals processed by the control partmay be output to the audio output part. In addition, voice signals processed by the control partmay be input to the external output device through the external device interface part.

170 100 Additionally, the control partmay control overall operations of the display device.

170 100 150 100 In addition, the control partmay control the display deviceby a user command or an internal program input through the user input part, and may access the network to download a desired application or application list into the display device.

170 180 185 The control partmay output channel information selected by a user together with the processed image or voice signals through the display partor the audio output part.

170 135 180 185 150 In addition, the control partmay output image signals or voice signals of an external device such as a camera or a camcorder, which are input through the external device interface part, through the display partor the audio output part, according to an external device image playback command received through the user input part.

170 180 180 131 135 140 180 Moreover, the control partmay control the display partto display images, and may control the display partto display broadcast images input through the tuner, external input images input through the external device interface part, images input through the network interface part, or images stored in the storage part. In this case, an image displayed on the display partmay be a still image or video and also may be a 2D image or a 3D image.

170 100 Additionally, the control partmay play content stored in the display device, received broadcast content, and external input content input from the outside, and the content may be in various formats such as broadcast images, external input images, audio files, still images, accessed web screens, and document files.

173 173 173 173 100 100 100 100 100 Moreover, the wireless communication partmay perform wired or wireless communication with an external device. The wireless communication partmay perform short-range communication with an external device. For this, the wireless communication partmay support short-range communication by using at least one of Bluetooth™, Bluetooth Low Energy (BLE), Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, Near Field Communication (NFC), Wireless-Fidelity (Wi-Fi), Wi-Fi Direct, and Wireless Universal Serial Bus (USB) technologies. The wireless communication partmay support wireless communication between the display deviceand a wireless communication system, between the display deviceand another display device, or between networks including the display deviceand another display device(or an external server) through wireless area networks. The wireless area networks may be wireless personal area networks.

100 100 173 100 100 170 100 173 100 Herein, the other display devicemay be a mobile terminal such as a wearable device (for example, a smart watch, a smart glass, and a head mounted display (HMD)) or a smartphone, which is capable of exchanging data (or inter-working) with the display device. The wireless communication partmay detect (or recognize) a wearable device capable of communication around the display device. Furthermore, if the detected wearable device is a device authenticated to communicate with the display device, the control partmay transmit at least part of data processed in the display deviceto the wearable device through the wireless communication part. Therefore, a user of the wearable device may use the data processed by the display devicethrough the wearable device.

175 175 100 The voice acquisition partmay acquire audio. The voice acquisition partmay include at least one microphone (not illustrated) and may acquire audio around the display devicethrough the microphone (not illustrated).

180 170 135 The display partmay convert image signals, data signals, or on-screen display (OSD) signals, which are processed in the control part, or images signals or data signals, which are received in the external device interface part, into R, G, and B signals to generate driving signals.

100 100 12 FIG. Furthermore, the display deviceillustrated inis just one embodiment of the present disclosure and thus, some of the components illustrated may be integrated, added, or omitted according to the specification of the actually implemented display device.

In other words, if necessary, two or more components may be integrated into one component, or one component may be divided into two or more components. Additionally, a function performed by each block is to describe an embodiment of the present disclosure and its specific operation or device does not limit the scope of the present disclosure.

12 FIG. 100 133 135 131 132 According to another embodiment of the present disclosure, unlike, the display devicemay receive images through the network interface partor the external device interface partand play them without including the tunerand the demodulation part.

100 For example, the display devicemay be divided into an image processing device such as a set-top box for receiving broadcast signals or contents according to various network services and a content playback device for playing content input from the image processing device.

12 FIG. 180 185 In this case, an operating method of a display device according to an embodiment of the present disclosure described below may be performed by one of the display device described with reference to, an image processing device such as the separated set-top box, and a content playback device including the display partand the audio output part.

185 170 The audio output partreceives the audio-processed signal from the control partto output an audio signal.

190 100 170 180 185 The power supply partsupplies the corresponding power to the entire display device. Particularly, power may be supplied to the control partthat is capable of being implemented in the form of a system on chip (SOC), the display partfor displaying an image, the audio output partfor outputting audio, and the like.

190 Specifically, the power supply partmay include a converter that converts AC power to DC power and a DC/DC converter that converts a level of the DC power.

180 The above-described present disclosure can be implemented as a computer-readable code on a medium in which a program is recorded. The computer-readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer-readable medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like. In addition, the computer may include a processor () of an artificial intelligence device.

According to the display device according to the present disclosure, if both a light-transmitting area and a light-shielding area exist in the light-transmitting panel, the color difference appearing between the light-shielding area and the light-transmitting area of the transparent panel can be corrected based on the external illuminance value, thereby improving the image quality, so the industrial applicability is remarkable.